The error codes are used in the response message.
| Error code | Description | Explanation |
|---|---|---|
| 0 | No error | - |
| 1 | CRC checksum error |
CRC checksum check fails. |
| 2 | Invalid message ID |
Unit receives an unknown message ID. |
| 3 | Invalid length |
Data length does not comply with the message type. For example, a data length of 0 in a message which always contains data triggers this error. |
| 4 | Invalid data |
Data contained in the message is invalid. For example, an attempt to set an invalid port speed or to set value to a read-only parameter. |